The budget carrier said traffic, or revenue passenger miles flown, fell 1.5% to 8.1 bil vs. 8.3 bil in Nov. '11. Available seat miles increased 0.4% to 10.2 bil. Nov. '12 load factor — a measure of capacity — narrowed to 80.0% from 81.6% last year. Southwest (LUV) filed an application for slot exemptions that Spirit Airlines (SAVE)discontinued using, allowing it to offer nonstop service between Washington's Reagan Washington National Airport and Houston's Hobby Airport. Southwest shares fell 0.7%.